answersLogoWhite

Top Answer
User Avatar
Wiki User
Answered 2008-12-11 06:01:54

The film model is the simplest approach to the prediction of mass transfer coefficients. It is not as elegant as boundary layer theory, penetration theory or a variety of other theories used. With film theory you can transform a complex convective transfer problem into a simper soluble problem. The goal is to retain enough of the essential physics to ensure that the simple model will predict some of the observations of the complex system.

The major assumption is that all of the resistance to mass transfer occurs in an immaginary film of unknown thickness.

By making these assumptions the problem becomes easily solved because the parameter values can all be measured or looked up in a table.

001
๐Ÿ™
0
๐Ÿคจ
0
๐Ÿ˜ฎ
0
๐Ÿ˜‚
0
User Avatar

Your Answer

Still Have Questions?

Related Questions

Advantages and disadvantages of technology transfer?

The advantages of technology transfer is that China can mass produce United States nuclear apparatus and sell it back for cheaper prices. The main disadvantage is there are compromises to US security.


What is mass transfer?

Mass transfer is the net movement of mass from one location to another


What is the advantages of center of mass?

Center of mass has no advantages. It just kind of is.


What is the difference between heat transfer and mass transfer?

Heat transfer deals with the movement of heat and temperature gradients. The three types of heat transfer are conduction, convection, and radiation. Mass transfer deals with concentrations of a particular substance. Types of mass transfer include diffusion and convection.


When F type mass transfer coefficients are preferred?

mass transfer coefficient in f&k type


When was Mass - film - created?

Mass - film - was created in 2004.


What is the mass of a film canister?

Determine the mass of your film canister and write in data chart. ... By using < or > symbols predict the mass of a film canister that would either float or ...


What are the advantages and disadvantages of mass media?

Well what is the disadvantages of advantages of Mass Media? Being a student I feel that I have no disadvantages on Mass Media. I feel that it has only advantages and some people take some advantages wrong as disadvantages.Without media world will be no where today


What has the author Ernst Rudolf Georg Eckert written?

Ernst Rudolf Georg Eckert has written: 'Introduction to heat and mass transfer' -- subject(s): Transmission, Heat, Mass transfer 'Introduction to the transfer of heat and mass'


List of scientific theories?

Theory of law. Theory of the climate. Theory of lax. Theory of vandals. Newtons's theory of mass.


Four eras of Mass Communication Theories?

According to the book "Mass Communication Theory: Foundations, Ferment, and Future," the four eras of mass communication theories are the mass society theory, the limited-effects perspective, the critical-cultural theories, and the framing theory.


Advantages and disadvantages of mass marketing?

no


Furious lows of mass transfer operation?

The Furious laws of mass transfer operation makes use of the Newton's law for fluid momentum.


What mass laws can be explained by Dalton's atomic theory?

The conservation of mass, that mass cannot be created or destroyed, is explained by Dalton's theory that atoms are indivisible and cannot be destroyed.


Why closed system is termed as control mass?

Closed system has no mass transfer, but energy may transfer across the system boundary thus it is also known as control mass system.


What are the advantages and disadvantages of mass communication?

advantages: good disadvantages: bad


Disadvantage of mass media?

I feel as a student there are advantages only no dis advantages


Does mass affect heat transfer?

yes,because there will be just heat transfer if theres a change in temperature but also depends on the mass or amount of a material


Which postulate of Dalton's theory is based on law of conservation of mass?

Mass of reactants = mass of products


What was Isaac Newton's most significant theory about the motion of objects?

it was his theory about mass


What is the Difference between diffusivity and mass transfer coefficient?

The rate of transfer of a process is equal to the driving force divided by the resistance.The mass transfer coefficient is the resistance to mass transfer. In mass transfer the driving force is the concentration gradient. The mass transfer coefficient is considered anything that contributes to resistance to mass transfer: thermal and eddy diffusivity, distance, etc.Fick's law of diffusion describes convective mass transfer as:N=-c*D*(ca2-ca1)/(z2-z1)where:-c is some constant multiplier (unitless)-The quantity (z2-z1) is the distance between two points. (length i.e. meters)-D is the mass diffusivity or the diffusion coefficient and is dependent on properties of the substance (such as particle size etc.) and temperature. (units: length2/time i.e. m2/s)-The quantity (ca2-ca1) is the concentration gradient between the same two points (the driving force) (units: amount/length3 i.e. mol/m3)-N is the rate of mass transfer (units: mass/(length2*time) i.e. mol/m2*s) )Putting Fick's law in terms of the mass transfer coefficient kc', yields:N=-kc'*(ca2-ca1)where kc'= -c*D/(z2-z1).You can see that the mass transfer coefficient is in fact a function of the diffusivity.


What are the Advantages of bio mass?

Biomass is renewable.


What are the advantages of mass tourism in Kenya?

safari


What was the Pangaea theory?

The Pangaea theory is the theory that all the continents were once connected together into a single land mass.


What has the author Clement Willis Bowman written?

Clement Willis Bowman has written: 'Mass transfer from disperse particles' -- subject(s): Bubbles, Mass transfer


Still have questions?